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tif_dir.h

/* $Header: /src/CVS/kdc2tiff/include/tif_dir.h,v 1.2 2001/03/15 22:53:38 cvs Exp $ */

/*
 * Copyright (c) 1988-1996 Sam Leffler
 * Copyright (c) 1991-1996 Silicon Graphics, Inc.
 *
 * Permission to use, copy, modify, distribute, and sell this software and 
 * its documentation for any purpose is hereby granted without fee, provided
 * that (i) the above copyright notices and this permission notice appear in
 * all copies of the software and related documentation, and (ii) the names of
 * Sam Leffler and Silicon Graphics may not be used in any advertising or
 * publicity relating to the software without the specific, prior written
 * permission of Sam Leffler and Silicon Graphics.
 * 
 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, 
 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY 
 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.  
 * 
 * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF 
 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 
 * OF THIS SOFTWARE.
 */

#ifndef _TIFFDIR_
#define     _TIFFDIR_
/*
 * ``Library-private'' Directory-related Definitions.
 */

/*
 * Internal format of a TIFF directory entry.
 */
typedef     struct {
#define     FIELD_SETLONGS    3
      /* bit vector of fields that are set */
      u_long      td_fieldsset[FIELD_SETLONGS];

      uint32      td_imagewidth, td_imagelength, td_imagedepth;
      uint32      td_tilewidth, td_tilelength, td_tiledepth;
      uint32      td_subfiletype;
      uint16      td_bitspersample;
      uint16      td_sampleformat;
      uint16      td_compression;
      uint16      td_photometric;
      uint16      td_threshholding;
      uint16      td_fillorder;
      uint16      td_orientation;
      uint16      td_samplesperpixel;
      uint32      td_rowsperstrip;
      uint16      td_minsamplevalue, td_maxsamplevalue;
      double      td_sminsamplevalue, td_smaxsamplevalue;
      float td_xresolution, td_yresolution;
      uint16      td_resolutionunit;
      uint16      td_planarconfig;
      float td_xposition, td_yposition;
      uint16      td_pagenumber[2];
      uint16*     td_colormap[3];
      uint16      td_halftonehints[2];
      uint16      td_extrasamples;
      uint16*     td_sampleinfo;
      char* td_documentname;
      char* td_artist;
      char* td_datetime;
      char* td_hostcomputer;
      char* td_imagedescription;
      char* td_make;
      char* td_model;
      char* td_software;
      char* td_pagename;
      tstrip_t td_stripsperimage;
      tstrip_t td_nstrips;          /* size of offset & bytecount arrays */
      uint32*     td_stripoffset;
      uint32*     td_stripbytecount;
#if SUBIFD_SUPPORT
      uint16      td_nsubifd;
      uint32*     td_subifd;
#endif
#ifdef YCBCR_SUPPORT
      float*      td_ycbcrcoeffs;
      uint16      td_ycbcrsubsampling[2];
      uint16      td_ycbcrpositioning;
#endif
#ifdef COLORIMETRY_SUPPORT
      float*      td_whitepoint;
      float*      td_primarychromas;
      float*      td_refblackwhite;
      uint16*     td_transferfunction[3];
#endif
#ifdef CMYK_SUPPORT
      uint16      td_inkset;
      uint16      td_dotrange[2];
      char* td_inknames;
      char* td_targetprinter;
#endif
} TIFFDirectory;

/*
 * Field flags used to indicate fields that have
 * been set in a directory, and to reference fields
 * when manipulating a directory.
 */

/*
 * FIELD_IGNORE is used to signify tags that are to
 * be processed but otherwise ignored.  This permits
 * antiquated tags to be quietly read and discarded.
 * Note that a bit *is* allocated for ignored tags;
 * this is understood by the directory reading logic
 * which uses this fact to avoid special-case handling
 */ 
#define     FIELD_IGNORE                  0

/* multi-item fields */
#define     FIELD_IMAGEDIMENSIONS         1
#define FIELD_TILEDIMENSIONS        2
#define     FIELD_RESOLUTION        3
#define     FIELD_POSITION                4

/* single-item fields */
#define     FIELD_SUBFILETYPE       5
#define     FIELD_BITSPERSAMPLE           6
#define     FIELD_COMPRESSION       7
#define     FIELD_PHOTOMETRIC       8
#define     FIELD_THRESHHOLDING           9
#define     FIELD_FILLORDER               10
#define     FIELD_DOCUMENTNAME            11
#define     FIELD_IMAGEDESCRIPTION        12
#define     FIELD_MAKE              13
#define     FIELD_MODEL             14
#define     FIELD_ORIENTATION       15
#define     FIELD_SAMPLESPERPIXEL         16
#define     FIELD_ROWSPERSTRIP            17
#define     FIELD_MINSAMPLEVALUE          18
#define     FIELD_MAXSAMPLEVALUE          19
#define     FIELD_PLANARCONFIG            20
#define     FIELD_PAGENAME                21
#define     FIELD_RESOLUTIONUNIT          22
#define     FIELD_PAGENUMBER        23
#define     FIELD_STRIPBYTECOUNTS         24
#define     FIELD_STRIPOFFSETS            25
#define     FIELD_COLORMAP                26
#define FIELD_ARTIST                27
#define FIELD_DATETIME              28
#define FIELD_HOSTCOMPUTER          29
#define FIELD_SOFTWARE              30
#define     FIELD_EXTRASAMPLES            31
#define FIELD_SAMPLEFORMAT          32
#define     FIELD_SMINSAMPLEVALUE         33
#define     FIELD_SMAXSAMPLEVALUE         34
#define FIELD_IMAGEDEPTH            35
#define FIELD_TILEDEPTH             36
#define     FIELD_HALFTONEHINTS           37
#define FIELD_YCBCRCOEFFICIENTS           38
#define FIELD_YCBCRSUBSAMPLING            39
#define FIELD_YCBCRPOSITIONING            40
#define     FIELD_REFBLACKWHITE           41
#define     FIELD_WHITEPOINT        42
#define     FIELD_PRIMARYCHROMAS          43
#define     FIELD_TRANSFERFUNCTION        44
#define     FIELD_INKSET                  45
#define     FIELD_INKNAMES                46
#define     FIELD_DOTRANGE                47
#define     FIELD_TARGETPRINTER           48
#define     FIELD_SUBIFD                  49

#define     FIELD_CODEC             50    /* base of codec-private tags */
/*
 * Pseudo-tags don't normally need field bits since they
 * are not written to an output file (by definition).
 * The library also has express logic to always query a
 * codec for a pseudo-tag so allocating a field bit for
 * one is a waste.   If codec wants to promote the notion
 * of a pseudo-tag being ``set'' or ``unset'' then it can
 * do using internal state flags without polluting the
 * field bit space defined for real tags.
 */
#define     FIELD_PSEUDO                  0

#define     FIELD_LAST              (32*FIELD_SETLONGS-1)

#define     TIFFExtractData(tif, type, v) \
    ((uint32) ((tif)->tif_header.tiff_magic == TIFF_BIGENDIAN ? \
        ((v) >> (tif)->tif_typeshift[type]) & (tif)->tif_typemask[type] : \
      (v) & (tif)->tif_typemask[type]))
#define     TIFFInsertData(tif, type, v) \
    ((uint32) ((tif)->tif_header.tiff_magic == TIFF_BIGENDIAN ? \
        ((v) & (tif)->tif_typemask[type]) << (tif)->tif_typeshift[type] : \
      (v) & (tif)->tif_typemask[type]))

typedef     struct {
      ttag_t      field_tag;        /* field's tag */
      short field_readcount;  /* read count (-1 for unknown) */
      short field_writecount; /* write count (-1 for unknown) */
      TIFFDataType field_type;      /* type of associated data */
      u_short     field_bit;        /* bit in fieldsset bit vector */
      u_char      field_oktochange; /* if true, can change while writing */
      u_char      field_passcount;  /* if true, pass dir count on set */
      char  *field_name;            /* ASCII name */
} TIFFFieldInfo;

#define     TIFF_ANY    TIFF_NOTYPE /* for field descriptor searching */
#define     TIFF_VARIABLE     -1          /* marker for variable length tags */
#define     TIFF_SPP    -2          /* marker for SamplesPerPixel tags */

extern      const int tiffDataWidth[];    /* table of tag datatype widths */

#define BITn(n)                     (((u_long)1L)<<((n)&0x1f)) 
#define BITFIELDn(tif, n)           ((tif)->tif_dir.td_fieldsset[(n)/32]) 
#define TIFFFieldSet(tif, field)    (BITFIELDn(tif, field) & BITn(field)) 
#define TIFFSetFieldBit(tif, field) (BITFIELDn(tif, field) |= BITn(field))
#define TIFFClrFieldBit(tif, field) (BITFIELDn(tif, field) &= ~BITn(field))

#define     FieldSet(fields, f)           (fields[(f)/32] & BITn(f))
#define     ResetFieldBit(fields, f)      (fields[(f)/32] &= ~BITn(f))

#if defined(__cplusplus)
extern "C" {
#endif
extern      void _TIFFSetupFieldInfo(TIFF*);
extern      void _TIFFMergeFieldInfo(TIFF*, const TIFFFieldInfo[], int);
extern      void _TIFFPrintFieldInfo(TIFF*, FILE*);
extern      const TIFFFieldInfo* _TIFFFindFieldInfo(TIFF*, ttag_t, TIFFDataType);
extern      const TIFFFieldInfo* _TIFFFieldWithTag(TIFF*, ttag_t);
extern      TIFFDataType _TIFFSampleToTagType(TIFF*);
#if defined(__cplusplus)
}
#endif
#endif /* _TIFFDIR_ */

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